They are sold in parcels. There isn't like a list of debtors in default the bank maintains that you can go pick from. It's more like here's 1,287 loans defaulted on, worth a total of $4,342,230 that you can bid on.
Debt collectors usually do not have the ability to target specific people's debt in the debt packages that they buy.
You still have a history of non payment and debt being sent to collections on your credit report.